A well-written composition__________ a good choice of words and clear organization among other things.
The old man was found on the floor .
Scientists are convinced ________ the positive effect of laughter _______ physical and mental health.
Each of the students,working hard at his or her lessons,to go to university.
He has devoted all his life ______ the homeless children.
In the end, Japan and Korea reached the point ___ both sides sat down and had a peaceful talk.